Bug 2308680 (CVE-2024-8235)

Summary:	CVE-2024-8235 libvirt: Crash of virtinterfaced via virConnectListInterfaces()
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ailan, berrange, ddepaula, eblake, jdenemar, jferlan, jmaloy, jsuchane, knoel, pkrempa, ymankad
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in libvirt. A refactor of the code fetching the list of interfaces for multiple APIs introduced a corner case on platforms where allocating 0 bytes of memory results in a NULL pointer. This corner case would lead to a NULL-pointer dereference and subsequent crash of virtinterfaced. This issue could allow clients connecting to the read-only socket to crash the virtinterfaced daemon.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2308689
Bug Blocks:

Description OSIDB Bzimport 2024-08-30 13:15:59 UTC

A refactor of the code fetching the list of interfaces for multiple APIs introduced a corner case on platforms where allocating 0 bytes of memory results in a NULL pointer.

This corner case would lead to a NULL-pointer dereference and subsequent crash of `virtinterfaced` if virConnectListInterfaces() is called requesting 0 networks to be filled.

The bug was introduced in libvirt-10.4.0 and reproduces only on platforms where allocation of 0-length memory returns NULL instead of a valid pointer.

Upstream fix:
https://gitlab.com/libvirt/libvirt/-/commit/8dfb12cb77996519901b8d52c754ab564ebd10e8

Comment 1 errata-xmlrpc 2024-11-12 08:53:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:9128 https://access.redhat.com/errata/RHSA-2024:9128